Muscle and Electromyography (EMG)

The prime mover of arm abduction is the ________ muscle.

• trapezius

• deltoid

• triceps brachii

• biceps brachii

Which of the following is an example of an isometric contraction?

• shaking the head as to say "no"

• pushing against an immovable wall

• bending the elbow

• rotating the arm

Which of the following is a type isometric exercise in which muscles increase in size and strength?

• lifting weights

• jogging

• swimming

• biking

Which of these muscles is located on the ventral (anterior) side of the body?

• latissimus dorsi

• occipitalis

• pectoralis major

• gastrocnemius

What muscle closes the mouth and protrudes lips?

• Petoralis major

• Masseter

• Exter oblique

• Orbicularis oris

Gluteus maximus ?

• Extends thigh

• Abducts leg

• Bend trunk

• Flex leg

Primmover means

• The muscle doing the action

• The muscle is at rest

• Helper muscle

• Calcaneus

• Femur

What muscle flexes the wrist?

• Flexor carpi radialis

• Brachioradialis

• Diaphragm

• All of the above

During muscular contraction a cross bridge is formed between

• troponin and tropomyosin

• the actin binding site and the myosin head

• tropomyosin and the myosin head

• proponin and the myosin head

What is the name of the thick myofilaments?

• Actin

• Myoglobin

• Myosin

• Titan